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不同浓度氟对茶树幼苗叶片叶绿素荧光特性的影响
钟秋生,林郑和,陈常颂,陈志辉,游小妹,陈荣冰
福建省农业科学院茶叶研究所,福建省农业科学院茶叶研究所,福建省农业科学院茶叶研究所,福建省农业科学院茶叶研究所,福建省农业科学院茶叶研究所,福建省农业科学院茶叶研究所
摘要:  为探讨氟对茶树[Camellia sinensis (L.) O. Kuntze]叶片叶绿素荧光特性的影响,采用盆栽沙培法,用不同浓度的NaF 溶液处理6 周,对茶树叶片的叶绿素荧光特性进行研究。结果表明,用600 mg L-1 的氟处理,茶苗叶片的OJIP 曲线O 相呈小幅度上升,P 相下降得非常明显,IP 相显著下降,出现清晰的L 点(150 μs)和K 点(300 μs);经过氟处理的茶苗叶片I 点、J 点的相对可变荧光和耗散能增加;荧光参数RC/CSo、ETo /ABS、PIabs、PIcs 等明显下降,而DIo/RC、DIo/CSo 和DIo/ABS 等参数大幅度增加;叶片氟含量与ETo/TRo、REo/ABS、PICS 呈负相关,与DIo/RC 呈正相关。因此,氟胁迫处理削弱了茶树叶片的光合电子传递能力,影响了光合机构的作用,同时叶片以增加自身热耗散来防止受到光抑制和光破坏。
关键词:  茶树  氟胁迫  叶绿素荧光特性  光合作用
DOI:10.11926/j.issn.1005-3395.2014.06.005
分类号:
基金项目:国家茶叶产业技术体系项目(nycytx-23);福建省农科院创新团队项目(CXTD-1-1302);福建省农科院青年科技人才创新基金项目(2010QB-14)资助
Effects of Fluoride Stress on Chlorophyll Fluorescence in Leaves of Tea Seedlings
ZHONG Qiu-sheng,LIN Zheng-he,CHEN Chang-song,CHEN Zhi-hui,YOU Xiao-mei and chen rongbing
Tea Research Institute, Fujian Academy of Agricultural Sciences,Tea Research Institute, Fujian Academy of Agricultural Sciences,Tea Research Institute, Fujian Academy of Agricultural Sciences,Tea Research Institute, Fujian Academy of Agricultural Sciences,Tea Research Institute, Fujian Academy of Agricultural Sciences,Tea Research Institute, Fujian Academy of Agricultural Sciences
Abstract:  The objective was to understand the effect of fluoride (F) stress on chlorophyll fluorescence in tea [Camellia sinensis (L.) O. Kuntze ‘Ruixiang’] leaves. Tea seedlings at 10-month-old grown in pots were fertilized with NaF three times weekly for 6 weeks. The results showed that O phase in OJIP curve rose a little treated with 600 mg L-1 NaF, and P phase and IP phase decreased obviously, L-step at about 150 μs and K-step at about 300 μs appeared. Under F stress, the fluorescence parameters, such as RC/CSo, ETo/ABS, REo/ETo, REo/ABS, PIabs and PIcs decreased in tea leaves, while VJ, VI, DIo/RC, DIo/CSo, DIo/ABS and dissipated energy increased. There were negative correlations between F content in tea leaves and ETo/TRo, REo/ABS and PICS, but a positive correlation with DIo/RC. Therefore, the ability of photosynthetic electron transfer in tea leaves was weakened under F stress, the whole electron transport chain from PSII to PSI was affected, meanwhile, leaves could prevent light suppression and light damage by increasing heat dissipation itself.
Key words:  Camellia sinensis  Fluoride stress  Chlorophyll fluorescence  Photosynthetic characteristic

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